I was reading this paper by Cretekos et al (2008), in which they state that wing development in the bat is not complete until after birth - the wing continues to elongate postnatally. This would suggest that bats are unable to fly immediately after birth, and a brief web search confirms this.
However, I would like to know:
When is wing growth (by which I simply mean outward growth or extension) complete?
When are bats able to fly? (Are there other developmental processes that take place after wing extension that delay this process?)